What is the ruling on someone who always says to others, especially to those older and more knowledgeable than him, "I am pleased with you and angry with you," and then gets angry if he is forbidden from doing so?

There is no harm in a person being pleased with someone in some matters and displeased with them in other matters, if there is justification for it. A person's emotions can change, and the Lawgiver has encouraged moderation and balance in love and hate, and weighing good deeds against bad deeds. The Prophet, peace and blessings be upon him, said: "Love your beloved moderately, for he may be your enemy one day. And hate your enemy moderately, for he may be your beloved one day." And he said: "A believing man should not hate a believing woman; if he dislikes one of her characteristics, he will be pleased with another." The Lawgiver has also encouraged love for the sake of Allah and in Allah, for among the reasons for the sweetness of faith is a person's love purely for Allah. And "Those who love each other for My sake will have pulpits of light that the Prophets and martyrs will envy."