Feelings are not the measure. Sincerity is not enough. Those who worship Buddha and Mohammed are certainly sincere in what they do and no doubt have good feelings about their worship. To a greater extreme, there are those who worship Satan and are sincere in so doing. This feeling of sincerity they exhibit does not justify their actions or make it right.
True worship is with the mind.
This is true and acceptable worship, not because we feel it, but because it is based upon truth. This is far from being correct. We worship, because as Christians, it is what we do. Do not conform any longer to the pattern of this world, but be transformed by the renewing of your mind . As a Christian, your life style is one of worship to God.