play into (someone`s) hands
to do something that gives someone else an advantage
The man walked out of the meeting in anger which only played into the hands of the other side.
Boost Self Confidence
how your conditioning and your relationship with your parents as a child continue to affect you.
Children begin by loving their parents. After a time they judge them. Rarely, if ever, do they forgive them. - Oscar Wilde
Your self-image began to take shape even before you left the cradle and was pretty well established by the time you reached the age of 8.
By then, on average, you had already received over 70,000 negative dictates: 'Don't do that', 'No you can't', 'Who do you think you are?''You'll never make anything of yourself,'and so on. Most of these were run of the mill reprimands to which adults attach little importance; but they affect a child deeply and the accumulated effect can be devastating. The truth is, children simply do not have the ability to distinguish between fair and unfair criticism, or make allowances if the adults in their lives have had a hard day.
When you pleased your parents, or other adult authority figures, they rewarded you: they gave you attention and approval. When you displeased them, they showed their disapproval by withdrawing attention or privileges or, in some cases, punishing you physically. The means by which a person moulds the behaviour of another using a combination of reward and punishment is termed conditioning. You experienced plenty of it as a child, much of it negative. Very few young people reach adulthood without having their confidence dented in some way.
Once you understand your conditioning you can unravel the knots, dispense with the ropes that tied you down and leave them behind forever.