Some teachings say that we must develop will and the power to do...
That type of teaching is elementary. Early on the path seekers must find power in order to sustain the efforts to journey through the jungle of psychological suffering and painful karma. The individual must believe it has power otherwise it will crumble under the pressure.
However, that is temporary. Attachment to power invariably creates psychological suffering through the lack of acceptance of things as they are and the desire to change things by brute force. And we suffer because we cannot change the outcome of things when things go wrong. Conversely, when our choices (that is, the relative power we have) align with the rest of the universe and things go right, we couldn’t care less about suffering or any of this stuff we are discussing.
Later on, the picture reverses. This is beautifully depicted on Tarot’s Major Arcana in the Hangedman symbol. The “Truth that sets us free” is that the individual is utterly powerless except within very limited conditions and always dependent on the Whole for its expression. In fact, the individual is an expression of the whole.
This is a major shift in spiritual perspective and the notions of control, mastery, power or will are by force discarded in favor to a much broader sense of self which carries Freedom and Peace with it always and everywhere.