Just to be clear
The 5th article of the Remonstrants does NOT teach that one can lose salvtion, rather it admits ambiguity as to whether one can "walk away from salvation".
Article 5.
[Assurance and Security - corresponds to the fifth of TULIP’s five points, Perseverance of the Saints]
That those who are incorporated into Christ by true faith, and have thereby become partakers of his life-giving Spirit, as a result have full power to strive against Satan, sin, the world, and their own flesh, and to win the victory; it being well understood that it is ever through the assisting grace of the Holy Spirit; and that Jesus Christ assists them through his Spirit in all temptations, extends to them his hand, and if only they are ready for the conflict, desire his help, and are not inactive, keeps them from falling, so that they, by no deceit or power of Satan, can be misled nor plucked out of Christ’s hands, according to the Word of Christ, John 10:28: “Neither shall any man pluck them out of my hand.” But whether they are capable, through negligence, of forsaking again the first beginning of their life in Christ, of again returning to this present evil world, of turning away from the holy doctrine which was delivered them, of losing a good conscience, of neglecting grace, that must be more particularly determined out of the Holy Scripture, before we ourselves can teach it with the full confidence of our mind.