Definition
This idiom expresses the idea that one's actions directly determine the treatment or consequences one will receive; it means that your deeds will ultimately dictate your outcomes.
He always bullies others, and now he is being ostracized by his colleagues; it's truly a case of reaping what he sowed, as the saying goes, 'As ye sow, so shall ye reap.'
If you are kind to others, they will be kind to you; this is the principle of 'As ye sow, so shall ye reap.'
She worked hard and eventually got promoted, which perfectly illustrates the idea of 'As ye sow, so shall ye reap'.