Although the degree to which it impacted their relationship is not clear, there seemed to be a struggle between Abraham's yearning for knowledge and Thomas' lack of understanding about the importance of study to Abraham's life. Abraham seemed particularly critical of his father's lack of education and lack of an earnest drive to see that his children received a good education. Historian Ronald C. White wrote that negative portraits of Thomas Lincoln come "from a son who said his father 'grew up literally without education,' the very value Abraham Lincoln would come to prize the most." Abraham Lincoln, in turn, appears to have been unaware of his father's early struggles, particularly how the death of his grandfather forced Thomas to become a laborer: "Abraham Lincoln never fully understood how hard his father had to struggle during his early years. It required an immense effort for Thomas, who earned three shillings a day for manual labor or made a little more when he did carpentry or cabinetmaking, to accumulate enough money to buy his first farm." Father and son also differed in their beliefs about religion; Thomas was a conventional Baptist. Growing up in a nonconformist household, Abe developed on his own as a free-thinker. Lastly, some say that Thomas favored John Johnston, his stepson, over Abraham. Their relationship had become strained after Abraham left his father's house and even more so after Abraham reluctantly bailed Thomas out of financial situations. His stepbrother, John D. Johnston, also made repeated requests for money.