When a person tries hard for certain objectives and gets partial success he may not be satisfied though outside people will be congratulating him. He will be in fact pondering over the reasons and deficiencies responsible for a limited success in his endeavour. He is not happy with his achievements which are below his expectations.
So definitely until unless we ourselves are not satisfied with our performances and success obtained there is no point in taking the congratulations of friends and relatives on their face value.
Knowledge is power.
Lord Krishna is the charioteer for Arjuna. He motivated him and helped him in every moment of war and made him to succeed. Salya is the charioteer for Karna. He used to criticize Karna always and used to down grade him always. This is also a factor which caused defeat of Kauravas. So motivation is very important for one to reach his goal.
This will add up to the determination of the Individual for attaining the success.
Service to mankind is service to God.
Generally anyone who puts efforts and hard work expects some kind of compensation. It may be money, appreciation or some other way of rewards and compensation.
Only after getting these one may work for self satisfaction exclusively.
'Idhuvum Kadandhu Pogum "
Even this challenging situation would ease