One must know oneself as one is, not as one wishes to be, which is merely an ideal and therefore fictitious, unreal; it is only that which is that can be transformed, not that which you wish to be.
Yoga is a generic name for any discipline by which one attempts to pass out of the limits of one's ordinary mental consciousness into a greater spiritual consciousness.
The River adapts itself to whatever route prove possible, but the river never forgets its one objective: the sea. So fragile at its source, it gradually gathers the strength of the other rivers in encounters. And, after a certain point, its power is absolute.