What is the importance of ‘inculcating’ when conveying the message of Islam and implementing it into life?

This can be done postivly, for example a person who says, “I should succeed, if I work hard, I certainly can do that,” grabs at an important secret on the way to success. This kind of inculcation is motivating of our own self. On the other hand, a fathers’ inculcating his son as, “you are going to achieve, you are going to be an important person,” is an external motivation. But can this act be done in a negative matter? Why or Why Not. In adddition, cont. answering the main Q, Thanks.