“Again he said, ‘What shall we say the kingdom of God is like, or what parable shall we use to describe it? It is like a mustard seed, which is the smallest seed you plant in the ground. Yet when planted, it grows and becomes the largest of all garden plants, with such big branches that the birds of the air can perch in its shade’”. 

Mk 4:30, 31, 32 NIV 

Natural growth is an amazing process. Sit under an oak tree towards the end of summer and feel an acorn hit you on the head. Then look up and see the mighty oak tree soaring some twenty five or thirty metres into the sky and be amazed that such a massive tree can grow from so tiny an acorn. 
“That”, said Jesus “is what the kingdom of God is like”. This can have two meanings. The kingly rule of God in a person’s life can develop into a massive life of usefulness, service and glory to God. The lives of Mother Theresa of Calcutta and Albert Schweitzer spring to mind, people in whom God worked so powerfully that they became world figures. It can also mean that the movement Jesus began by working in the lives of only twelve disciples developed into a mighty world movement. Today, world-wide, there are some two and a quarter billion Christian disciples – the largest religion numerically on the globe. 
There is no telling in human terms, what God can do. Never underestimate his influence or power. Do not give way to despair when it seems that opposition to Christianity and indifference appear to be on the rise. Whenever people write the Christian movement off God gets busy again and some form of revival and renewal burst forth. 

Lord, impact the world again with grace and glory.