From the basic LWB - It says, "water dripping drop by drop erodes even the hardest stone. Moderation, patience, care and adaptability.
The usual Temperance is all about moderation and balance and while this is too, it is pointing more towards being patient, gathering our Willpower and to wear out all obstacles bit by bit - one step at a time. I think that is actually a great lesson here - I am not a patient person at the best of times - so a nice reminder to just let things be. They will get done eventually.
My Tarot Card Practice. I have been studying Tarot for over 20 years now and am still learning new things daily.