▁of ▁C usa , ▁Gi ord ano ▁Bruno , ▁M end els so hn , ▁and ▁Less ing ▁all ▁were ▁p ande ists ▁or ▁lean ed ▁towards ▁p ande ism . ▁ ▁Philosoph ically , ▁Wein stein ▁was ▁attract ed ▁to ▁what ▁he ▁called ▁a ▁psych ical ▁or ▁spiritual ▁mon ism , ▁which ▁he ▁believed ▁to ▁be ▁compar able ▁to ▁the ▁p ant he ism ▁of ▁Sp ino za , ▁and ▁where in ▁the ▁ess ence ▁of ▁all ▁phen omena ▁could ▁be ▁found ▁entirely ▁in ▁the ▁mind . ▁Though ▁he ▁could ▁see ▁no ▁way ▁around ▁the ▁event ual ▁heat ▁death ▁of ▁the ▁Un iverse , ▁Wein stein ▁suggested ▁that ▁there ▁existed ▁a ▁fundamental ▁' ps ych ical ▁energy ,' ▁of ▁which ▁a ▁maximum - ent ropy ▁world ▁would ▁ultimately ▁consist . ▁Wein stein ▁wrote : ▁ ▁From ▁this ▁prem ise ▁Wein stein ▁reason ed ▁that ▁the ▁world ▁must ▁have ▁both ▁a ▁beginning ▁and ▁an ▁end , ▁and ▁that ▁a ▁super natural ▁force ▁must ▁have ▁initi ated ▁it , ▁and ▁so ▁could ▁bring ▁about ▁its ▁end ▁as ▁well : ▁ ▁Though ▁he ▁rejected ▁the istic ▁form ulations ▁regarding ▁such ▁things , ▁Wein stein ▁found ▁the ▁origin ▁of ▁the ▁Un iverse ▁to ▁be ▁so ▁problem atic ▁that ▁he ▁wrote : ▁" As ▁far ▁as ▁I ▁can ▁see , ▁only ▁Sp ino z ist ▁p ant he ism , ▁among ▁all ▁philosoph ies , ▁can ▁lead ▁to ▁a ▁satisf actory ▁solution ." ▁ ▁Works ▁▁ ▁Hand buch ▁der ▁phys ikal ischen ▁Ma ass best imm ungen