intermittency

Security in a relationship lies neither in looking back to what it was in nostalgia, nor forward to what it might be in dread or anticipation, but living in the present relationship and accepting it as it is now. For relationships, too, must be like islands. One must accept them for what they are here and now, within their limits -- islands, surrounded and interrupted by the sea, continually visited and abandoned by the tides. One must accept the security of the winged life, of ebb and flow, of intermittency.

-- Anne Morrow Lindbergh Gift From the Sea