Verse 6. Not with eyeservice. That is, not with service rendered only under the eye of the master, or when his eye is fixed on you. The apostle has here adverted to one of the evils of involuntary servitude as it exists everywhere. It is, that the slave will usually obey only when the eye of the master is upon him. The freeman, who agrees to labour for stipulated wages, may be trusted when the master is out of sight; but not the slave. Hence the necessity, where there are slaves, of having "drivers" who shall attend them, and who shall compel them to work. This evil it is impossible to avoid, except where true religion prevails -- and the extensive prevalence of true religion would set the slave at liberty. Yet, as long as the relation exists, the apostle would enjoin on the servant the duty of performing his work conscientiously, as rendering service to the Lord. This direction, moreover, is one of great importance to all who are employed in the service of others. They are bound to perform their duty with as much fidelity as though the eye of the employer was always upon them, remembering that though the eye of man may be turned away, that of God never is.

As men-pleasers. As if it were the main object to please men. The object should be rather to please and honour God.

But as the servants of Christ. See Barnes "1 Co 7:22".

Doing the will of God from the heart. That is, God requires industry, fidelity, conscientiousness, submission, and obedience in that rank of life. We render acceptable service to God when, from regard to his will, we perform the services which are demanded of us in the situation in life where we may be placed, however humble that may be.