Back to the OP question... Sure, just about everyone I know achieves a state of security only through psychological means. We accept the world around us mainly at face value, and when we cannot cope with the environment around us our very own brain undergoes a stage of trickery and self-deception most of the times. We try to condition ourselves (through reasoning and validations) into a state of relativistic ‘comfort’, mayhap subjective. Psychologists’ main purposeis to bring about a state of security onto their patients – this is a well established science. One may be said to have reached a personal ‘Nirvana’ when he/she achieves ‘ultimate’ security in the face of whatever environment or hardship – if you learn to do this without suffering please tell me someday.
I do hope on having children someday, and I have philosophised deeply about a plausible way to raise kids so that they are in complete psychological comfort and security that will naturally fend them away from any plausible hurt should it arise. This without them being oblivious and ignorant of dis-pleasurable sensations, and hence their understanding – but without experiencing it themselves. I am still along way off completing my project, but I believe I may need to amass considerable wealth in order to raise ‘pain-free’ wise eudemonic children – not likely this lifetime.
I guess that the biggest psychological comfort, and security, one can attain (and also by the easiest means) is the acceptance of religion into one’s life, a higher entity if you must say so. Sure, it is possible without such a notion, but such technicalities in obtaining it in this sense I have not given much thought to yet.