Surrender has been defined in the Hari Bhakti Vilas, Bhakti Rasamrita Sindhu, the Vayu Purana & the Ahirbudhni Sanhita…… as per
1–> To desrie only in accordance with the desire of God. By nature, we are His servants & the duty of a servant is to fulfill the desire of the master. So, as surrenderred devotees of God, we msut make our will conform to the will of God.
A dry leaf is surrendered to the wind. It does not complain whether the wind lifts it up, takes it forward or backward, or drops it to the ground. Similarly, we too must learn to be happy in the happiness of God.