Both of the above answers sound good to me. More phrases you could use are: Peace, In God's love, God bless, Take care, yours truly, best wishes, with prayers, You are in my thoughts and prayers, as always, shalom, with care and concern, as ever, with thoughts and prayers, good luck. You could also repeat the greeting such as Happy Birthday, Get Well, Hope for a speedy recovery, with sympathy, hang in there, Congratulations, Thanks again, etc. If the card is for a brother-in-law you don't like as mentioned above just use something short and simple that expresses concern or well wishes, and then sign your name. I hope this helps!
