St. Thomas Aquinas
“There are two things to be considered regarding the use of this sacrament. The first is on the part of the sacrament itself, the virtue of which gives health to men; and consequently it is profitable to receive it daily so as to receive its fruits daily. Hence Ambrose says (De Sacram. iv): ‘If, whenever Christ’s blood is shed, it is shed for the forgiveness of sins, I who sin often, should receive it often: I need a frequent remedy.’ The second thing to be considered is on the part of the recipient, who is required to approach this sacrament with great reverence and devotion. Consequently, if anyone finds that he has these dispositions every day, he will do well to receive it daily. Hence, Augustine after saying, ‘Receive daily, that it may profit thee daily,’ adds: ‘So live, as to deserve to receive it daily.'”
Source: St. Thomas Aquinas, Summa Theologica