"But seek till ye find, and, whatever ye find for the present, let your last act be to lay and leave yourselves on the righteousness of His Son, expecting life through His name, according to the promise of the Father"

Donald Cargill's quote provides rich spiritual assistance, combining determination, faith, and submission to divine righteousness. The phrase "But seek till ye discover" is an encouragement for unrelenting pursuit of spiritual reality and understanding. This reflects a deep dedication to seeking a relationship with God, advocating for active engagement instead of passive faith. The journey of looking for is represented as important and continuous, stressing the importance of determination.

The recommendation to "whatever ye discover for the present" recommends that the journey of faith will include experiences and realizations that may not be totally comprehensible or rewarding in the moment. This can be understood as an acknowledgment of the progressive nature of spiritual growth, where existing understanding might develop gradually. It suggests a humility and openness to continued knowing and discovery.

Cargill's instruction to let "your last act be to lay and leave yourselves on the righteousness of His Son" centers on the Christian teaching of salvation through Christ. Here, he underscores the value of eventually depending on Christ's righteousness instead of one's own deeds or achievements. This act of laying oneself on Christ indicates a full surrender, trusting that salvation and spiritual fulfillment can not be achieved through human effort alone, however through divine grace.

The mention of "expecting life through His name" aligns with the pledge of immortality in Christian belief, where faith in Jesus is viewed as the path to long lasting life. The "guarantee of the Father" refers to the covenant and guarantees found within Christian teachings-- a pointer of God's loyalty.

In summary, Cargill's words require an active, enduring look for reality, a reliance on Christ's righteousness, and trust in God's pledges. It's an invitation to embrace a faith journey identified by perseverance, humbleness, and deep trust in divine pledges.