with all one's heart, from the bottom of one's heart
köken: Literally, “with all the heart”.
Rusçaот всей души́, от чи́стого се́рдца
Farsçaاز ته دل
Felemenkçeuit de grond van zijn hart, van harte /vɑn ˈɦɑr.tə/
from the bottom of one's heart, sincerely, cordially, with love
köken: Literally, “from the heart”. The form harte is an old dative case form of hart. An even older form, still attested in Early Modern Dutch, was van harten.