'Simplicity' in the Bible
With Absalom went 200 men from Jerusalem, who were invited [as guests to his sacrificial feast]; and they went in their simplicity, and they knew not a thing.
And day after day they regularly assembled in the temple with united purpose, and in their homes they broke bread [including the Lord's Supper]. They partook of their food with gladness and simplicity and generous hearts,
He who exhorts (encourages), to his exhortation; he who contributes, let him do it in simplicity and liberality; he who gives aid and superintends, with zeal and singleness of mind; he who does acts of mercy, with genuine cheerfulness and joyful eagerness.
Servants, obey in everything those who are your earthly masters, not only when their eyes are on you as pleasers of men, but in simplicity of purpose [with all your heart] because of your reverence for the Lord and as a sincere expression of your devotion to Him.