I don`t know so much about Jehovah`s Witnesses following their heart garyneal , I`m more inclined to beleive , they follow whatever the Governing Body / Watchtower says at the present time., and that can change any moment and as we have seen before it can mean a complete reversal of what they beleived previously.
To suggest they follow their heart , just does not compute with me , the majority of them have no heart , which is borne out by their treatment of their very own family members sons and daughters mothers and fathers who cut each other off in a blink of an eye , because the GB or WT says so .
smiddy