Jesus never said it would be easy. In all of our walks, there are times when we look (with our eyes) at what is happening around us and we get frustrated and discouraged. We ask ourselves if we are making a difference. We need to be reminded that God is using us despite what we see. He doesn't promise that we will see the fruits of our ministry, but God's word says that what we see does not matter. Don't get discouraged, God has promised to renew you every day.
"Therefore we do not give up; even though our outer person is being destroyed, our inner person is being renewed day by day. For our momentary light affliction is producing for us an absolutely incomparable eternal weight of glory. So we do not focus on what is seen, but on what is unseen; for what is seen is temporary, but what is unseen is eternal."
2 Corinthians 4:16-18