Allah makes you generations succeeding one another so that He may try you in respect of your actions. So beware of the beguilements of the world and those of women. Everyone likes them and is attracted towards them. The most delicious fruit of this world is woman but at the same time it is the most baneful. This Hadith contains four words, the meanings and implications of which constitute its essence.
Guidance here means guidance at every turn of life and steadfastness on the path of truth.
Fear of Allah is the greatest means of piety and strongest defense against sins. Chastity is the state of being free from what is unlawful. What it implies is that one should not care for what people possess. This Hadith emphasizes the importance of having the fear of Allah. So much so that if somebody has made a vow to commit some sin he should break it, arrange for its expiation and keep himself away from that sin or any other act that contravenes the fear of Allah.