There can be no love so long as there is lust- even a speck of it, as it were, in the heart. None but men of great renunciation, none but mighty giants among men, have a right to that Love Divine. If that highest ideal of love is held out to the masses, it will indirectly tend to stimulate its worldly which dominates the heart of man- for, meditating on love to God by thinking of oneself as His wife or beloved, one would very likely be thinking most of the time of one's own wife- the result is too obvious to point out.
Swami VivekanandaLet us realise [that] we are the infinite power. Who put a limit to the power of mind? Let us realise we are all mind. Every drop has the whole of the ocean in it. That is the mind of man. The Indian mind reflects upon these [powers and potentialities] and wants to bring [them] all out. For himself he doesn't care what happens. It will take a great length of time [to reach perfection]. If it takes fifty thousand years, what of that!
Swami Vivekananda