Perseverance

Persevere in your aspiration and effort, do not allow yourself to be discouraged by setbacks. This always happens in the beginning. But if you continue to fight without paying any attention to them, a day will come when the resistances give way and the difficulties vanish. My help is always with you, but you must learn to use it and to rely on it rather than on your own resources.

Will

There must first be the will to change firmly conceived and held—then to open the consciousness to the Force and let it work with the inner assent to its working. When there is the psychic opening, then even the things most obstinate in the nature can change. Develop the will—the will grows by a steady use, like the muscles, and grows strong.

Divine Will

The Divine’s will is that we should be like channels always open, always more wide, so that His forces may pour their abundance into the mould. Divine Will―the will expressing the highest Truth. We must lie before the Divine always like a page perfectly blank, so that the Divine’s will may be inscribed in us without any difficulty or mixture.

Ego

The ego thinks of what it wants and has not. This is its constant preoccupation.
The soul is aware of what it is given and lives in endless gratitude.
…. It is the ego which changes all the contacts of life into suffering, it is the ego which prevents us from being conscious of the Divine Presence within us and from becoming His calm, strong and happy instruments.
Let us make a complete offering of this ego with all its desires to the Divine, let us be confident and wait for the liberation that is sure to come.

Vital

It [vital] means prāṇa—it is the life-force and desire-force in a man and the part of the being that responds to desire and is the instrument of the life-forces.
The vital can be a good instrument, but it is a bad master.
The vital has not to be killed or destroyed, but purified and transformed by the psychic and spiritual control.