If you want to be a true doer of divine works, your first aim must be to be totally free from all desire and self-regarding ego. All your life must be an offering and a sacrifice to the Supreme; your only object in action shall be to serve, to receive, to fulfil, to become a manifesting instrument of the Divine Shakti in her works. You must grow in the divine consciousness till there is no difference between your will and hers, no motive except her impulsion in you, no action that is not her conscious action in you and through you.
Until you are capable of this complete dynamic identification, you have to regard yourself as a soul and body created for her service, one who does all for her sake. Even if the idea of the separate worker is strong in you and you feel that it is you who do the act, yet it must be done for her. All stress of egoistic choice, all hankering after personal profit, all stipulation of selfregarding desire must be extirpated from the nature.
There must be no demand for fruit and no seeking for reward; the only fruit for you is the pleasure of the Divine Mother and the fulfilment of her work, your only reward a constant progression in divine consciousness and calm and strength and bliss. The joy of service and the joy of inner growth through works is the sufficient recompense of the selfless worker.
Ref: The Mother with Letters on The Mother