True treasure: or, Thirtie holy vowes. Containing the brief sum of all that concernes the Christian centurians conscionable walking with God first. Solemnly made, since often renewed, and again seriously reviewed; with some particulars added: the more to encrease and confirme his Christian resolutions. All in the onely strength of the Almighty. By Phillip Skippon, Sergeant Maior generall, &c. The most unworthy souldier of Christ Jesus.