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.

Sincerity

When you are absolutely sincere, you make a constant effort to live in harmony with the highest ideal of your being, the truth of your being. At every moment, in all that you think, all that you feel and all that you do, you try as perfectly as possible, as completely as possible, to put yourself in harmony with the highest ideal or, if you are conscious of it, with the truth of your being-then you have reached true sincerity….

Discipline

Without discipline no proper work is possible.
Without discipline no proper life is possible.
And above all, without discipline no Sadhana is possible. …. A certain inner and outer discipline is necessary in order that one may grow into the spirit of the Yoga and the natural impulses of the vital cannot be a guide to action there. One has to perceive what one should or should not do and impose this discipline on oneself;….

Inertia

Inertia is mental, vital, physical, subconscient. Physical inertia can produce mental inertia, mental inertia can produce physical inertia, vital inertia almost always makes the physical lifeless and lustreless and dull, and that is inertia. Vital inertia can also infect the mind, unless the mind is very strong and clear. I have always said that the physical consciousness is the main seat and source of inertia.

Practice & Methods

All can be done by the Divine, the heart and nature purified, the inner consciousness awakened, the veils removed, if one gives oneself to the Divine with trust and confidence—and even if one cannot do so fully at once, yet the more one does so, the more the inner help and guidance comes and the contact and the experience of the Divine grows within. If the questioning mind becomes less active and humility and the will to surrender grow in you, this ought to be perfectly possible. No other strength and tapasya are then needed, but this alone.