The moment we use the term 'help', a kind of egocentric idea enters into us. If we help someone, that means we are in a superior position. When we help, we feel that we are one step ahead or one step higher than the ones that we are helping. But if we serve someone, then we offer our capacity with humility, on the strength of our loving concern and oneness. So let us use the proper term, 'service'.
How can one know who his spiritual teacher is?...His heart looks at the spiritual Masters and makes the choice. When the heart sees a spiritual Master, if it is overwhelmed with joy, then there is every probability that that spiritual Master is the right one for the seeker.
Imagination plays a most significant role in the spiritual life. Suppose you are not having good meditations, but six months ago you had a very good, powerful, high meditation. What you can do is try to imagine that powerful meditation. Then your imagination will become reality. After fifteen minutes or half an hour, you will get a good meditation. Vivekananda was such a great spiritual figure, yet sometimes for six months at a time he did not have a good meditation. What did he do? He used to imagine a time when he did have a good meditation, and inside his imagination was aspiration. So imagination is very good.