Hugo Black,
Johnson v. Zerbst — Opinion of the Court
“ The purpose of the constitutional guaranty of a right to counsel is to protect an accused from conviction resulting from his own ignorance of his legal and constitutional rights, and the guaranty would be nullified by a determination that an accused's ignorant failure to claim his rights removes the protection of the Constitution. True, habeas corpus cannot be used as a means of reviewing errors of law and irregularities-not involving the question of jurisdiction-occurring during the course of trial ”
