Rabbi Shlomo Aviner:
When we respond in anger, the anger is not at the child, rather it is at ourselves. Do not be alarmed. An infrequent event will not leave a scar on the child's education.
Education is not built upon infrequent occurrences, and it is not destroyed by infrequent non-education.
Education is continuous toil.
The essence is that there is love, love in one's heart and expressions of love. And this love is equal to all of the reprimand. It also better than a flood of reproofs.
Love is the foundation. Without love – there is no child.