Buddhist writings often reference the Five Hindrances when discussing obstacles in meditation, but if you continue meditating and are aware of the hindrances as they build up inside you, observe the sensation of the hindrance, then let it go. You will learn to recognize each hindrance as it you become more aware of the sensation of each.
1. Sensual Desires
As rain penetrates an ill-thatched house, So lust penetrates an undeveloped mind.
As rain does not penetrate a well-thatched house, So lust does not penetrate a well-developed mind.