When the grace of Guru and God is there, why is the mind still not controlled?

There must be Purushartha ( Self Effort ) also. Only when you do Purushartha, the grace will come. A professor will not answer the questions for you and make you pass. The Gita says, "Uddharet Atmanatmanam". One should raise oneself. Grace only helps one to raise oneself. Everybody should work out his own salvation. You may ask, "What is grace then?". If an aspirant gets letters from his preceptor, clearing his doubts, that is grace. If an aspirant comes here, takes Ganges bath and hears the lectures here, that is grace. Many people are thirsting, even croropathis (those who possess crores of rupees) are thirsting to come and bathe in the Ganges, but all do not get a chance of coming and having their wish fulfilled. If good books are available for Svadhyaya (study), it is grace. If one enjoys good health for doing Sadhana, that is grace. If God so wishes, He can give Mukti to the whole world in an instant; but He does not do so. Grace descends only when there is Purushartha ( Self Effort ) .

Swami Sivananda