There’s a well-known story about a lute player who approached the Buddha for guidance on his struggles with meditation.
“What happens when you tune your instrument too tightly?” the Buddha asked.
“The strings break,” the musician replied.
“And what happens when you string it too loosely?”
“When it’s too loose, no sound comes out,” the musician answered. “The string that produces a tuneful sound is not too tight and not too loose.”
“That,” said the Buddha, “is how to practice: not too tight and not too loose.”