The Greek verb tarassō (ταράσσω) means to stir up, disturb, trouble, agitate, or throw into confusion. It is used of stirring water (John 5:7), of troubled spirits or emotions (John 11:33; 13:21), and of social agitation or unrest (Acts 17:8). It describes disturbance at every level — physical, emotional, spiritual, and social.
In John's Gospel, tarassō plays a profound theological role. Jesus says to His disciples, 'Do not let your hearts be troubled (tarasesthō). You believe in God; believe also in me' (John 14:1). This command in the face of coming suffering reframes the disciples' anxiety within the context of faith. Remarkably, Jesus Himself is described as troubled in spirit (John 12:27; 13:21) — the Son of God fully experiencing human distress. This is not weakness but solidarity. The antidote to troubled hearts is not the absence of difficulty but the presence of Christ: 'Peace I leave with you' (John 14:27).