Single - Vine's Expository Dictionary of New Testament Words
Single[ 1,,G573, haplous ]
simple, single," is used in a moral sense in Matthew 6:22; Luke 11:34, said of the eye; "singleness" of purpose keeps us from the snare of having a double treasure and consequently a divided heart. The papyri provide instances of its use in other than the moral sense, e.g., of a marriage dowry, to be repaid pure and simple by a husband (Moulton and Milligan). In the Sept., Proverbs 11:25.