It is not easy to keep on doing the right thing, especially when there is no sign that anybody appreciates it, or if there is no evidence of any good effect.  But doing what is right is just like agricultural sowing.  There is always a time lag between the seed going into the ground and the harvest coming out.  The farmer never knows, early on, how the weather may affect the crop, or even how much of the seed will germinate (Mark 4:26-29).  Those who sow generously will reap a bigger harvest (2 Corinthians 9:6).  But if he does not sow, it is certain that he will not reap.
 
However, when God’s people ‘sow’ truth and righteousness, love and forgiveness, mercy and grace – He will ensure that there is a harvest which will bring Him glory, and there will be plenty to share with His co-workers.  But how can we keep sowing into hard, hostile and indifferent lives of the people around us?  Only if we are keeping in step with the Spirit, and crucifying our own passions (Galatians 5:24-25).  If that is our lifestyle then God’s harvest will come.

Although the Lord wants us to be salt and light in a corrupt world, we must start sowing righteousness in God’s family.  That is why we are commanded to serve our brothers and sisters in Christ - to learn a habit of life.  It starts with taking the opportunities which God gives us to share what He has given us (2 Corinthians 8:1-5), to meet the needs of others (Deuteronomy 15:7-8), and to bear one another’s burdens (Galatians 6:2).  Those opportunities are God’s signals for us to take action (Ephesians 5:15-16; Colossians 4:5-6).  
 
‘Giving up’ is a natural fleshly response when we cannot achieve what we want.  ‘Keeping on’ is a supernatural spiritual response which is found in people who welcome the Holy Spirit’s presence in their lives.  He gives them the confidence that the Lord will act in power at the right time (Isaiah 40:27-31). Weariness is a combination of tiredness and discouragement.  When they tell us to stop, we need to hear the Lord tell us to keep on sowing.  There may seem to be no obvious benefit to doing simple acts of kindness, or in sharing words of truth which may be rejected.  But the Lord knows, and He will reward His faithful servants.  So do not allow yourself to measure today’s service by its effects today.  Keep serving and let the Lord use it how He wishes.  One day you will see that the Lord has been at work in multiplying what you have done, for His glory.