"At last the Teacher is approaching the climax of his book. We cannot see God"s whole plan, and there is nothing in this world that we can build on so as to find satisfaction or the key to the meaning of things. Yet we are to fulfill God"s purpose by accepting our daily lot in life as from him and by thus pleasing him make each day a good day. But how can we please him when there is so much we cannot understand? The Teacher has already shown that certain things stand out as right or wrong, and a sensible conscience will see these as an indication of what God desires. This section gives further wise advice in the light of an uncertain future. We must use common sense in sensible planning and in eliminating as many of the uncertainties as we can." [1][source]
Ignorance of the future should lead to diligent work, not despair. [source][source][source]