Theophylact of Bulgaria
The observation that the supplication was of human essence, characterized by a natural inclination towards life rather than emanating from the divine nature, contrary to the claims of the condemned Arians, becomes apparent through the intense struggle endured by Jesus, which caused, as the saying goes, drops of blood to fall from Him. This saying about those who toil intensely refers to those whose exertion leads them to sweat as if they were shedding blood, similar to those who grieve deeply and are said to cry tears of blood. The evangelist uses the term "drops of blood" not to imply a mere thin fluid but to illustrate the significant sweat produced, effectively conveying the reality of His human struggle.
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Therefore, it is clear that the nature which was sweating and agonizing was human, not divine. This human experience was permitted to demonstrate that He was not an illusory figure and to fulfill the deeper intention of alleviating the common fears of humanity by fully embracing and conquering them according to God's will. Others might suggest that the sweat falling from His body to the earth symbolizes how, through the empowerment and fortification of our humanity in Christ, the sources of our fears dissipate and transform into droplets that fall away from us. If His intention had not included the healing of our inherent fearfulness, He would not have engaged in such sweating, even amidst His own deep anxiety.