Pain is the interval between two pleasures: In pain, we gain, Is it true?

We have seen our lives alternate between pain and pleasure. It is the common experience, whether he is a theist or atheist. But it is also seen pain teaches us mysteriously whereas in pleasure, we stagnate or recede. In fact in pleasure we are siphoning the bank balance but in pain we repay our dues. Whether you agree? Which one we should welcome in life? Pain or Pleasure?