"Resolute determination" means having a strong and unwavering mindset to achieve a goal, not giving up easily even in the face of challenges or obstacles. Full definition
The finance minister, who was expected to sit down with Notley late Wednesday, said he intended to reinforce the Trudeau government's «resolute determination» to keep the project on track. (canadianbusiness.com)
Does not the same logic demand that we ask, «What is revealed about the Father's nature and love in his resolute determination to slay the son?» (religion-online.org)
This only fuels their desperation and resolute determination to win elections by all means. (blog.politics.ox.ac.uk)