According to Osho, raising both hands engages both brain hemispheres—the right hand linked to the left brain and the left hand to the right brain—so your gesture represents your whole being. A single raised hand expresses only half-hearted assent, shaped by a cultural bias toward the right. He asks for both hands to cultivate totality: wholehearted mind, heart, and body aligning in an authentic, undivided yes.
Using two hands means your whole brain and heart are saying yes, not just one side.