Don’t we all need firm ground under our feet?
Don’t we guard our sturdy roots and reliable traditions?
Don’t we build homes, sweet homes, with solid walls and deep foundations to withstand adversity?
 The precise quotation is "The more the water, the higher the boat." Yamamoto Tsunetomo, Hagakure, The Book of the Samurai (Translation By W. S. Wilson), Kodansha International, Tokyo..., 1979. As Daniel says, the boat is who you are, the identity that gives worth to your life.