Muso Soseki

Those who seek liberation for themselves alone cannot become fully enlightened. Though it may be said that one who is not already liberated cannot liberate others, the very process of forgetting oneself to help others is in itself liberating

When it's cold, water freezes into ice; when it's warm, ice melts into water. Similarly, when you are confused, essence freezes into mind; when you are enlightened, mind melts into essence.