The unavoidable implication of what you've written here is that you, the "saved" person, is a co-Savior with Jesus. But this is impossible. You would have to be as Christ is, perfect and infinite, in order to stand shoulder-to-shoulder with him as a co-Savior. But you have to be saved by Jesus precisely because you aren't perfect or infinite and cannot, therefore, save yourself (Ro. 5:6-10; Tit. 3:3-5; Eph. 2:1-3). In fact, elevating yourself to position of co-Savior with Jesus is a kind of blasphemy, requiring that Jesus be diminished in the efficacy of his atoning work on the cross, and that you be enlarged in your ability to contribute to what only Jesus could do as the "Lamb of God who takes away the sin of the world" (Jn. 1:29).
When, then, you take up the responsibility (and the power) to keep yourself saved, you deny both the completeness and power of Christ's salvific work at Calvary. To think you must exert yourself to retain his salvation of you is to necessarily indicate that his saving work was insufficient, it was incomplete, and so, cannot keep you saved. In order for it to be complete, to be fully efficacious, you must add your own "faith, obedience, and perseverance" to Christ's atonement on the cross. But nowhere does Scripture ever indicate this but, instead, confirms again and again, that Christ's atonement on the cross was perfect, once for all, entirely satisfying God's holy justice and needing no further contribution from us (He. 7-10:22; Ro. 5; 1 Pe. 1:1-8).
All of these passages were issued to Jews under the Old Covenant and thus according to the standards and means therein. For example, nowhere in the entire Sermon on the Mount in Matthew 5-7 does Jesus ever speak of his atoning, reconciling, justifying work at Calvary, the indwelling and empowering Holy Spirit, or direct, personal adoption into God's family. He just sets out an impossible standard for the Old Covenant Jews, one they already knew they could never achieve, preparing them for the "new and living way" he would accomplish through himself at the cross. So its a non-starter to use the passages you have above as grounds for your works-salvation error. This is particularly evident in light of what Jesus said to the Twelve (or eleven, actually) in John 15:4-5. Without the power of the Holy Spirit, the Spirit of Christ (Ro. 8:9), no one can do anything - certainly not fulfill Matthew 5:48, which is the standard God has set out for all who would be His own.
I haven't time right now to deal with the rest of your post, but it suffers from similar issues of interpretation.
