This subject is so big God is so big and we are so small in our
understanding and thinking.
I think it is possible that something obvious will occur and then the
consequences are obvious to all concerned. For example sleep
around and you risk health problems or pregnancy.
I think sometimes though we are completely unaware of what we are
sowing and therefore puzzled by the consequences. Also some
consequences can occur straight away while others can occur years
down the line.
Then there are times when things happen for no reasons that we can
possibly establish in the natural. God's ways however are far higher
than ours, His thoughts far higher than ours.
One thing did come to mind, we fight the world the flesh and the devil.
For example what did Job sow that he reaped such devastation?
Well nothing according to the bible, but he was fighting the schemes of
the devil! Sometimes it can just be that the devil goes around like
a roaring lion seeking to cause destruction. I suspect this happens
more than we think but Satan would rather we blame each other or
blame God. Job's friends certainly tried to blame him.
We, just like the disciples, are also quick to ask
"why is this man blind was it his sin or his parents sin".
John 9:2-3 NKJV
[2] And His disciples asked Him, saying, "Rabbi, who sinned, this
man or his parents, that he was born blind?" [3] Jesus answered, "Neither
this man nor his parents sinned, but that the works of God should
be revealed in him.
Incidentally I believe the man was born blind, not because God caused it,
but because we live in a fallen world where sickness occurs. But God in his
mercy healed the man.
Thankfully God often does negate the consequences of our own mistakes and wrong
doing, probably far more than we ever realise. But there are other times when
we need to reap what we sow otherwise how would we ever learn. It is also not
a good idea to deliberately go and act unwisely thinking God will bail us out.
It's not good to tempt God.
I suppose its like any parent you want your children to grow and learn what is right
and wrong. But you hope the lessons won't be so painful as to lead to destruction.