What does 'power over all flesh' mean in John 17:2?

'Power over all flesh' in John 17:2 conveys Christ's all-encompassing sovereignty, meaning He has authority over both the elect and the reprobate. This sovereignty is exercised in the context of salvation, as He has the power to give eternal life to those identified as 'as many as thou hast given him.' It reflects the divine sovereignty wherein God, in His mysterious wisdom, has chosen certain individuals for salvation. This doctrine underscores the Reformed belief that salvation is solely the result of God's electing grace, and Christ's proclamation of His power over all flesh reassures believers of His control and plan. His authority ensures that all whom the Father has elected will ultimately come to Him and be granted eternal life, highlighting His intimate relationship with His people.