The second part (which is longer in Dindorf III (http://spu.worldcat.org/title/clementis-alexandrini-opera/oclc/446346084), p. 503, ll. 16-20 than in PG 9, col. 755/756, and, so, does end with τήν ἑκάστου διάθεσιν) is "Ps. Clemens Hom. XI 8", not Clement of Alexandria ("Unechte Fragmente" no. 30).
Maximus, Sermon 55, p. 661.The former, i.e. superceded, edition of the Works ed. Stählin is online here: http://tinyurl.com/yazpsgy (Register here: http://tinyurl.com/ydccr2w). Stählin reproduces these out of Dindorff III (http://spu.worldcat.org/title/clementis-alexandrini-opera/oclc/446346084), p. 503, ll. 13-15 and ll. 16-20 respectively.
[John Chrysostom:] Above all, Christians are not allowed to correct with violence the delinquencies of sins. For it is not those that abstain from wickedness from compulsion, but those that abstain from choice, that God crowns. [Pseudo-Clement:] It is impossible for a man to be steadily good except by his own choice. For he that is made good by compulsion of another is not good; for he is not what he is by his own choice. For it is the freedom of each one that makes true goodness and reveals real wickedness. Whence through these dispositions God contrived to make His own disposition manifest.
I reproduce this information here only because it wasn't readily available on the Internet.