References in classic literature ?
Such another small basin of thin gruel as his own was all that he could, with thorough selfapprobation, recommend; though he might constrain himself, while the ladies were comfortably clearing the nicer things, to say:
Certes, you constrain me to sit down, since you enter upon such commonplace terms, of which each vile crowder hath a stock that might last from hence to Christmas.
Since thou dost in thy cruelty desire The ruthless rigour of thy tyranny From tongue to tongue, from land to land proclaimed, The very Hell will I constrain to lend This stricken breast of mine deep notes of woe To serve my need of fitting utterance.
So it happens with fortune, who shows her power where valour has not prepared to resist her, and thither she turns her forces where she knows that barriers and defences have not been raised to constrain her.
Of course it is a sad and sorry thing to have to live among strangers, and to be forced to seek their patronage, and to conceal and constrain one's own personality-- but God will help me.

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