Is it ‘Seize’ or ‘Cease’?

What has come over me?  I have become lacks, distracted, and unfocused in my endeavors.  Forgetful of my goals, and pursuits.  It is time to take the bull by the horns, once again, and begin anew.  It is time to ‘cease’ the day!  Or is that ‘seize’?  Oh well, whatever…I shall not cease to seize:)  Also, where would we be without spell check.