“Drive away from your mind all unnecessary, useless and obnoxious thoughts. Useless thoughts impede your spiritual growth; obnoxious thoughts are stumbling blocks to spiritual advancement. You are away from God when you entertain useless thoughts. Substitute thoughts of God. Entertain only thoughts that are helpful and useful. Useful thoughts are the stepping-stones to spiritual growth and progress. Do not allow the mind to run into the old grooves and to have its own ways and habits. Be on the careful watch.
You must eradicate through introspection all sorts of mean thoughts, useless thoughts, unworthy thoughts, impure thoughts, all sexual thoughts, thoughts of jealousy, hatred and selfishness. You must annihilate all destructive thoughts of disharmony and discord. You must develop thought-culture of good, loving, sublime thoughts, divine thoughts. Every thought must be of a constructive nature. It must be strong, positive and definite. The mental image must be of a clear-cut and well-defined nature. You must develop right thinking. Every thought must bring peace and solace to others. It should not bring even the least pain and unhappiness to anyone. Then you are a blessed soul on the earth. You are a mighty power on the earth. You can help many, heal thousands, spiritualise and elevate a large number of persons as did Jesus and Buddha.
Just as you grow jasmine, rose, lily, honolulu flowers in a garden, so also you should cultivate the flowers of peaceful thoughts of love, mercy, kindness, purity in the vast garden of Antahkarana. Through introspection, you have to water this garden of mind with meditation and sublime thinking and remove the weeds of vain, useless discordant thoughts.”