To every thing there is a season, and a time to every purpose under the heaven: a time to be born, and a time to die; a time to plant, and a time to pluck up that which is planted; a time to kill, and a time to heal; a time to break down, and a time to build up; a time to weep, and a time to laugh; a time to mourn, and a time to dance; a time to cast away stones, and a time to gather stones together; a time to embrace, and a time to refrain from embracing; a time to get, and a time to lose; a time to keep, and a time to cast away; a time to rend, and a time to sew; a time to keep silence, and a time to speak; a time to love, and a time to hate; a time of war, and a time of peace.
-Ecclesiastes 3:1-8
There's also a time for shadow/highlight detail, and a time for blocked shadows/highlights; a time for saturated colors, and a time for black and white; a time for sharpness and detail, and a time for soft focus; a time for shallow DOF, and a time for wide DOF; a time to overexpose, a time to underexpose, and a time to get exposure exactly right; a time to crop, and a time for negative space; a time for flash, and a time for ambient light; a time for heavily artistic post-processing, and a time to leave well enough alone; and a time for every camera format under the sun.
The trick is figuring out what treatment is appropriate for a given image. That is the beginning of photographic wisdom.