Of course you can have different kinds of experiences when you're meditating with discipline. Like deep sensations, seeing flashes of bright light in inner eye ETC. such experiences can indicate that you're doing it correctly but these are epiphenomena. This is not the real product.

I'm quoting a few extracts from an excellent book on meditation by a currently living enlightened monk: https://www.amazon.com/Million-Thoughts-Meditation-Himalayan...

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Four Stages of Mental Stillness

The truth is that the mind is always talking. It is never silent. On the path of meditation the transformation of mind from a restless monkey to a docile cow happens in four stages. Experience of sustained and deep silence is not simply about feeling the bliss of quietude. It’s much more than that.

One of the most amazing things you discover is a radical change in how you see the world around you – nothing provokes you any longer. This is one of the greatest rewards of right meditation – a state of no provocation. People, their statements, their responses, your own thoughts, reactions, emotions and desires – none of it will be able to provoke you.

Imagine you live in a metropolitan city and you have taken a sabbatical to spend some time in peace in a far off location – in a small, quiet, countryside town close to a seashore. Your journey involves a long drive and your goal is to get away from the hustle-bustle of the city life to the peaceful seaside. That calm seaside is the ultimate stage of meditation – infinite, expansive, oceanic. However, before you settle in such state and beyond, you will invariably go through the following four stages:

1. Constant Activity – The Motorway

This is the first stage. Mind is always talking and most people remain unaware. When they want the mind to be quiet, like before sleeping or when they are depressed, and it does not shut up, that is when they realize how talkative mind is. There is constant activity going on in the mind. During this stage, when a meditator sits down to meditate, his mind does not quieten beyond sporadic short periods lasting no more than a few seconds. All that the meditator hears is chatter. The more he tries to quiet the mind, the louder it becomes. Thoughts from everywhere continue their onslaught, discouraging the practitioner. At the end of their 30-minute long session, they get up more drained and tired. Some mistake it for relaxation but in reality it is no more than a short nap.

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The first stage of mental stillness is like the traffic on a major highway. Traffic is always flowing in both directions. The meditator is on the highway of thoughts. When you are on a highway, you have no control over the traffic around you. There are multiple lanes, there will be cars in front, in the left lane, in the right lane, behind you. Some are going slower than you, many are going faster than you, others are at the same pace as you. There is traffic flowing in your direction and in the opposite direction. People are not honking so nothing abruptly disrupts your cruise mode or distracts you, but you are aware of the traffic around you and you know this is normal on the freeway. You have to drive carefully, you cannot afford any mistakes while changing lanes. A meditator in the first stage has no control on the flow of thoughts. They are on a motorway and it is the peak hour. The only thing you can do is drive with utmost caution and eventually you will get off the freeway.

2. Frequent Activity – Suburban Road

In this stage, the flow of thoughts is frequent but not constant. A meditator experiences easiness and many quiet stints lasting several moments where they get a glimpse of a mind free from thoughts – a no-mind state, a heightened state of consciousness. Your ability to meditate for longer period increases by a few minutes. If in stage one, you could meditate for 30 minutes, now you can meditate for 45 minutes. Most people are unable to maintain their concentration beyond a few seconds.

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Think of this stage as driving on a suburban road. The thoughts in your mind are no longer traveling in 16 lanes in both the directions. The speed has come down by half. There is still a degree of constancy to them, they haven’t come to a halt yet nor have they disappeared. Your thoughts are travelling at a slower speed now. The traffic is more manageable. Your attentiveness increases noticeably as you get to this stage.

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3. Occasional Activity – The Countryside Road

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The third stage is the countryside road. You can drive for several miles before you come across any other vehicle. Green fields, meadows, pastures, pristine air, blue sky, expansive views, beautiful landscapes, quiet surroundings, no rush – ah, the pleasure of countryside driving! You can go slower or a bit faster, you choose your own pace. The conditions permit you to do that. A meditator who has reached stage three learns to harness and channelize his thoughts. Most of their sessions comprise spans of quiescence and bliss with occasional thoughts emerging here and there, on and off. They don’t get up all relaxed from their meditation, for relaxed they already are, otherwise it would not have been possible to get to this stage. Instead, they get up feeling supercharged, refreshed and alert. A great meditator is always alert. Alertness is not only the reward but an essential ingredient for good meditation. A stage three meditator can easily sit unmoving for three hours.

4. No Activity – No Thorough Fare

Even though I have called it a stage, there is really no going beyond this stage. Intellectually, we may define an infinite number of stages. In all practicality though, stage four is the outcome of crossing the three stages successfully. It comes with great, persistent, prolonged, intelligent, alert, intense and correct practice. Please carefully note all the seven adjectives in the previous sentence. You miss on any of these and there is no hope. A stage four meditator can sit unmoving, like a rock, for as long as he wants.

At this stage you experience extraordinary absorption and understand the reality of things unknown and inconceivable by the ordinary mind. Buddha said, “The one who knows the reality of one thing knows the reality of everything.”

The fourth stage is enlightenment.

On your long drive to selfrealization, think of this stage as a private property, a large villa, an exclusive chateau. It has a path, a road but it is no thoroughfare – a large gate and a high fence block noise, traffic, people and any unwanted visitors. You have your own garden, comfort and peace. Any visitor will either have taken prior appointment which means you are aware of their arrival beforehand or you will have the choice to let them in or not. A stage four meditator is an adept, a siddha. He can stay on a thought for as long as he so chooses. The awareness is so crystallized that he can decide which thought he wants to entertain and which one he wishes to let go. There are no surprises.