The teacher or saints of Bhakti movement composed hymns and sang bhajans glorifying God.
Shankaracharya believed that there is no difference between the soul of God and the soul of human beings. The way to salvation was through knowledge.
Ramanuja taught people to put themselves entirely in the hands of God,
and that by loving God and doing good deeds alone could the soul be saved.
Selfless love and devotion are the means to come close to God. The purityof the heart and mind is important.
All human beings are equal. God did not create high or low caste people, nor did he create Hindus and Muslims. So people should be tolerant of one another.
Helping fellow human beings is the true form of bhakti.