Surrender means whatever Supreme is offering to us, how we go through it with the best of our capacity and then offer it back to Supreme. So surrender and offering go hand in hand. Surrender cannot go alone. You surrender and then offer it to Supreme – "I have done what is in front of me to the best of my ability, I don't know what the result will be, I offer it You"...

So can we say surrender is highest form of worship? Definitely, it highest form of devotion. Worship is karm. The work you will do...is karm. It is highest form of worship. Surrender is HIGHEST form of faith and devotion... "I have full faith in You, whatever you will make me do, I will complete it, I will do it to the best of my ability."

Surrender does not mean thinking -- "You are the one who will do it, what is in my hands"...not being resigning, renouncing or complacency...when such thoughts come, it is not surrender. Surrender and devotion mean that whatever Supreme wants you to do, whatever HE has put in front of you, you do only that...

The faith and belief in "That" creates yearning of devotion and devotion demands our heartfelt surrendering to whom we devote.

The life is a mesh of happenings and events around us therefore whatever comes to our lot we are supposed to treat it as God's wish and we are suppose to discharge our duty with best of our ability and devotion as if our accomplishment is the offering to the All mighty, the God. This is what Gita says Karma Yog, "Do your duty with fullest of your ability as offering to Him" Karma is our Dharm.

"लिप्यते न स पापेन पद्मपत्रमिवाम्भस�� ।" (गीता 5, 10)
One who performs his duty with devotion and total surrender to Him without attachment is not tainted by sin as a lotus leaf by water. It is basically an attitude whereby one believes he is like a pipeline carrying whatever fluid from the source to the destination and not retaining anything for itself 

Hence surrender everything including thoughts to the Guru/ Almighty and realise the peace.