In Luke 9:62, as Jesus is responding to a series of would-be followers who attach conditions to their commitment, he declares: 'No man, having put his hand to the plough, and looking back, is fit for the kingdom of God.' The agricultural metaphor is drawn from everyday experience in a farming society: plowing a straight furrow requires that the plowman keep his eyes on a fixed point ahead. Any backward glance disrupts the line and makes the plowing crooked. The metaphor translates directly from practical agriculture to the requirements of discipleship: undivided, forward-focused commitment.
The immediate context in Luke 9 is significant. Three incidents precede the saying. A scribe offers to follow Jesus 'wherever you go'; Jesus warns of the homelessness of his mission. A man Jesus calls says he first needs to bury his father; Jesus gives the stark reply 'Let the dead bury their dead.' Another man says he will follow but first needs to say farewell to his family; this elicits the plowing metaphor. In each case Jesus strips away the qualified commitment and states the unqualified requirement. The pairing of 'putting the hand to the plough' with 'looking back' creates the image of movement without resolve - action without genuine departure from the previous life.
The backward glance has deep resonances in the biblical tradition. Lot's wife turns back to look at Sodom and becomes a pillar of salt (Genesis 19:26) - the canonical image of fatal hesitation between the old life and the new. The children of Israel repeatedly look back longingly toward Egypt during the wilderness wanderings, remembering the 'fleshpots' they left behind (Exodus 16:3) and preferring familiar slavery to risky freedom. The backward look represents not mere nostalgia but a fundamental failure of commitment to the new direction.
In English the phrase 'put one's hand to the plow' (or 'plough' in British usage) entered as a metaphor for committed engagement with a task, particularly one involving sustained effort and the need to maintain direction. It is used in motivational contexts, political speeches, and personal encouragement to describe the quality of commitment required for difficult long-term work: not just starting, but keeping going without looking back.
John F. Kennedy invoked the imagery in his 1961 inaugural address: 'Now the trumpet summons us again... to bear the burden of a long twilight struggle... In the long history of the world, only a few generations have been granted the role of defending freedom in its hour of maximum danger... The energy, the faith, the devotion which we bring to this endeavor will light our country and all who serve it - and the glow from that fire can truly light the world.' The address ends with 'ask not what your country can do for you - ask what you can do for your country' - a call to put one's hand to the plow without looking back.
The metaphor's continuing force lies in the accuracy of its agricultural observation: commitment is not merely an emotional state but a physical orientation. To plow straight you must look forward; to follow through on commitment you must not be mentally half in the previous arrangement. The biblical standard is demanding precisely because it acknowledges that genuine commitment requires more than good intentions - it requires the continuous redirection of attention from what one has left to what one is pursuing.