God has a plan for man's happiness—so Satan made a counterfeit plan. Following Satan's plan and trying to find happiness in money, sex, drugs, or good deeds is like leaning on a crutch that breaks and pierce your hand with splinters.
Life is an aging process and for those who reach old age there are special challenges and blessings. Solomon, the wisest man who ever lived, describes life and old age well in the book of Ecclesiastes.
There are many situations where life seems too much to handle or that disobedience to God would be the wisest course to follow. When you are tempted to think this, remember the two words, "But God..." and the wonderful Bible promises that follow them.