The Bhagavad Gita in the last chapter declares:
[I][B]“sarva-dharman parityajya, maam ekam sharanam vraja
aham tvam sarva-papebhyo, mokshayisyami ma suchah”[/B][/I] ,
i.e. (when you have exhausted all other ideas to attain Moksha/ Salvation/ Enlightenment), simply let go even the dutiful actions (i.e. Dharma) and surrender unto Me totally, and I will liberate you; have not the slightest doubt.
The Bhagavad Gita, being an exposition of the Way of Yoga, surrendering definitely seems to be the highest way to attain, the ultimate (spiritual) goal of human life.