Be your own Valentine

A container filled with mud cannot pour herbal tea into a cup.

They both are 4 letter words, both start with an L and end with an E, have 2 vowels each and are dependent on each other. Can you guess what the two words are? It’s LOVE and LIFE, a life without love is like a barren land, and love without life is impossible. You all believe you have love and life, but are you truly in love? Are you really alive?