Young Prahlada on the Modes of Devotion to Lord Vishnu

To hear the names, praises and stories of Lord Vishnu and chant them

To remember Him, to wait upon Him

To offer worship and salutation to Him

To dedicate one's actions to Him

To cultivate friendship with Him

To offer one's own body as well as one's dependents and belongings to Him

If devotion is practiced by a man as something already offered direct to Lord Vishnu, I reckon that devotion to be the highest form of learning.

(Vishnu appeared as Narasimha to save young Prahlada from his evil father.)