One of the basic points is kindness. With kindness, with love and compassion, with his feeling that is the essence of brotherhood, sisterhood, one will have inner peace. This compassionate feeling is the basis of inner peace.
Spirituality automatically leads to humility. When a flower develops into a fruit, the petals drop off on its own. When one becomes spiritual, the ego vanishes gradually on its own. A tree laden with fruits always bends low. Humility is a sign of greatness.
It is a special kind of enlightenment to have this feeling that the usual, the way things normally are, is odduncanny and highly improbable. G.K.Chesterton once said that it is one thing to be amazed at gorgon or a griffin, creatures which do not exist; but it is quite another and much higher thing to be amazed at a rhinoceros or a giraffe, creatures which do exist and look as if they don't. This feeling of universal oddity includes a basic and intense wondering about the sense of things.
[Buddhism and Christianity] are in one sense parallel and equal; as a mound and a hollow, as a valley and a hill. There is a sense in which that sublime despair is the only alternative to that divine audacity. It is even true that the truly spiritual and intellectual man sees it as sort of dilemma; a very hard and terrible choice. There is little else on earth that can compare with these for completeness. And he who does not climb the mountain of Christ does indeed fall into the abyss of Buddha.
The spiritual man habitually makes eternity-judgments instead of time-judgments. By faith he rises above the tug of earth and the flow of time and learns to think and feel as one who has already left the world and gone to join the innumerable company of angels and the general assembly and Church of the First-born which are written in heaven. Such a man would rather be useful than famous and would rather serve than be served. And all this must be by the operation of the Holy Spirit within him. No man can become spiritual by himself. Only the free Spirit can make a man spiritual.
There is a danger there - a very real danger to humanity. Consider, Watson, that the material, the sensual, the worldly would all prolong their worthless lives. The spiritual would not avoid the call to something higher. It would be the survival of the least fit. What sort of cesspool may not our poor world become?
There is...a tendency to think of the spiritual life as primarily introspective, divorced from the concerns of everyday life....Faith that does not translate into actions is no faith at all.
The receptive attitude enables one mind to fix itself to another as by spiritual grappling-irons. When you see that every word you utter us taken in, and weighed, and measured by your listener, you cannot free yourself from the influence of his presence. You are compelled to have in your thoughts not only the words you utter, but the man to whom they are spoken. You must not only talk, and talk well, but you must talk to him.