In the Bhagwad Gita Lord Krishna has referred to ‘the stillness of the mind’ as the greatest activity. So you help someone towards this great activity because it is the right thing to do. It is important to discern one who is ready from one who is not yet.
And there is a difference in discerning and judging.
When the mind stops drifting and becomes still you realize that which is the real you, the eternal Self that cannot be slain nor burnt, that within which lies the universe, where the play of the trinity and the duality are at rest, where time ceases to exist.