We are placed in this world with the purpose of spreading the Kingdom of God to others and God will help us in every way when we are on this mission. He will never leave us nor forsake us just as He taught His disciples while sending them out into the world. It is up to us if we are ready to depend on Him to carry out His mission.
Who does not want joy in this world? Irrespective of their faith, people will take a chance to grab any joy offered in this manner.
Jesus goes on to say that what is the point of loving only those whom we like and that even the pagans do that. We have seen the love of God, the unconditional love that God has shown us.
Soon after Jesus was baptized, he was led by the Spirit to the wilderness where he spent forty days and nights fasting.