This research has been a study in amazement. Initially an agnostic physics graduate, the researcher undertook training in the person-centred approach (pca) to self-development and counselling, during which she came to experience strange personal experiences which she could neither gainsay nor fit into her then worldview. Sketching these briefly, exceptional human experiences (EHEs) and synchronicities increasingly happened until (shockingly) they declared a seeming spirit guide (Mungo) to her, also juxtaposed in time with her first-ever chance encounter with dowsing. Thereafter these phenomena, combined with randomisable image-cards, tutored her into a physically observable method of 'discussion' with them (alone or with another) conducted with pca values. This PhD involved researching that phenomenon-complex through 'discussions' with 35 participants. The methodology used was heuristics and its heuristic self-search inquiry specialism (HSSI) whose attention to personal experiencing, indwelling to contact tacit knowledge, and incubatory rest phases to foster illuminatory new 'ahaa!' apprehensions suited this nascent mysterious subject. Both participants and researcher experienced coincidences weaving the 'discussions' and their wider lives together. Thus synchronicity became equal-partner research-topic, being studied as it occurred and, through affecting certain choices, becoming part of the methodology itself. The phenomenon-complex was experienced as fostering ethical living, creativity, personal development and science-spirituality interconnection in ways wellpitched and paced for each experiencer. The phenomena were also experienced as synergizing with each other, and as fostering integration within and between persons. After work on the participant sessions was completed, the writings of further thesis chapters were 'butted into' by in-the-moment relevant synchronicities, not just singly but in flows and patterns in which the researcher found herself discerning overarching meanings. Given this exceptional opportunity the researcher (in effect doing a bonus research-section) tracked her experiencing of these synchronistic flows and her responses thereto wherever they led, using Sela-Smith's first-person heuristic self-search inquiry (HSSI) methodology. Each synchronistically-influenced chapter was experienced as exploring certain themes, with themes building as the thesis progressed. Heuristics and HSSI are usually transformative. This researcher was transformed from the ground up from agnosticism to credence in 'something more' through her experiencings (both alone and inter-relationally with participants). Their 'package deal' presented personal shadow-work alongside help in life difficulties, and great fascination but darker times too. In total she came to feel part of an interconnected, spiritually-intelligent and compassionate cosmic domain, and existentially happier.