We would have read this science experiment in school. A frog when immersed into a pot of boiling water rapidly jumps out with no delay. But when you keep the same frog in a pot of cold water and start heating it, the frog responds interestingly. The frog alters its body temperature continuously to the point that it loses all its energy. In the end, this frog is incapable to jumping out and hence is boiled to death.
Here the irritant is heat. The frog responds promptly to instantaneous heat while the same heat produced over a period fails to elicit response.
Similarly in life we would escape from sudden and striking distress easily. Since we really perceive it as something which would decapitate our joy of living. While at the same time we would fail to ward off small-scaled trivial worries. These tiny worries as such will not demoralize you, yet an accumulation of them would. It is you decision to wake up and jump out or stay in the hot pot till you die.
“Handle every stress and move on with trust, never get accustomed”