Gal 6:7 Be not deceived; God is not mocked: for whatsoever a man soweth, that shall he also reap.
Gal 6:8 For he that soweth to his flesh shall of the flesh reap corruption; but he that soweth to the Spirit shall of the Spirit reap life everlasting.
OR as the CEV says it:
Gal 6:7 You cannot fool God, so don't make a fool of yourself! You will harvest what you plant.
Gal 6:8 If you follow your selfish desires, you will harvest destruction, but if you follow the Spirit, you will harvest eternal life.
Everything has a consequence. Even if it only is correctly maintaining the status quo.
Sin may result in consequences (e.g. a single mother has a child out of marriage) but God can help you cope with them and even remove the consequences at times.
At times, illness may be related to attitudes so that a person who is always critical may end up with thyroid problems and some one who is spineless may have back problems.
A woman who refuses to satisfy her husband sexually may end up with Inter uterine infections that will not go away.
The above are all cases I have come across.
Smokers may develop lung cancer.
Over eaters get overweight and can develop heart problems and diabetes.
This is why we need to listen to The Holy Spirit so that we do not develop problems in our health or in other areas because of the consequences of our actions.
Blessings are a consequence of correct obedience and service because we have the correct attitudes to act as we should.
A lack of blessing can occur because we are not doing what we should and by this are hindering blessing to us or another.
So whenever you do something make certain you have the peace of The Holy Spirit if the Bible is not clear on what you are doing.