Brahma is to be regarded as master of mantras. (SSB 1974, p. 44)
Brahman is the master of arti, artharthin, jijnasu and jnani and gives each one what he asks for. Brahman will give one who is after arthi his bodily comforts. For jijnasu, He gives Himself as that is what he desires. For one who is a jnani, Brahman will tell him about the paths of journey to the state of bliss of wisdom. (SSB 1974, p. 66)
Once you have mastered the senses and are unaffected by the allurements of the world, then you can face any situation without concern or problems. To master the senses you should develop a broad view; enter into the spirit of inquiry and find out what is Atma and what is Anatman. After developing this discriminating power, you can safely move in the world while continuing to keep your sight steadily on the goal. (DBG, p. 117)
When man makes mind his master it burdens him, worse than any beast; When man makes Buddhi his master it raises him, high as Lord of the living. (SSS Vol.11, p. 74)
Purify your emotions, clarify your impulses, cultivate love. Then only will you become master of yourself. (EL, p. 230)
Man should have no fear
The blemish that affects the mind is illusion. It is like a fierce dog that will not allow anyone to approach the Master. You can manage to by-pass it, only by assuming the rupam or Form of the Master, which is called Sarupyam, or by calling out for the Master so loudly that He comes down and accompanies you into the house, that is to say, by winning His Grace, Samipyam (proximity). Illusion is His pet and so, it will not harm you if He orders it to desist from harming you.
The Master comes to save not one good man from Illusion, but the whole of mankind. Of course, He has to come assuming a Form that man can Love, revere, and appreciate. He can give joy and courage, only if He speaks the language of human intercourse. Even as it is, many are afraid to approach Me, for they know I am aware of their innermost thoughts and deepest desires. But, let Me tell you, only helpless animals have fear. Man, who is child of Immortality, should have no fear. People pray before stone images of the snake God, but when the actual snake appears in answer to their prayers, they run away terror-stricken from the shrine! The Lord manifests Himself only to shower Grace, never to strike terror. (SSS Vol.4)