This is such a powerful card. Lust (sometimes known as Strength,) is connected with the deities Demeter and Astarte (born by lions) Venus, Babylon and the Beast of Revelation. The Scarlet Woman is riding the Beast here while holding the Holy Grail - imagery that illustrates the ecstatic dissolution of all we are into the universal self of godhead.
The message of Lust is this: At some point we are going to come to a level of consciousness so high that the only thing left is the universal consciousness of deity. Our dissolution into that consciousness is what we are trying to attain. Deity Lusts for that moment when we all return to it and we should also Lust for that moment as well.
In the immortal words of Iggy Pop:
I got a lust for life
Lust for life
My Tarot Card Practice. I have been studying Tarot for over 20 years now and am still learning new things daily.