What do you mean by "my heart longs for you, just like a deer longing for a stream"?

"My heart longs for you, just like a deer longs for a stream." In fact, this sentence means: "Lord, I am so eager for your kindness, just like a deer longs for a stream."

"My heart longs for you as a deer longs for a stream", preached by Korah's descendants (Ps. 42: 1). Lord, my heart longs for you as a deer longs for a stream. My soul longs for you, O God, as a deer longs for a stream.