Tafsir of Al-Furqan 25:58

وتوكل على الحي الذي ﻻ يموت

And put your trust in the Ever Living One Who dies not, meaning, in all your affairs, put your trust in Allah, the Ever-Living Who never dies, the One Who

اﻻول واﻻخر والظاهر والباطن

وهو بكل شيء عليم

(is the First and the Last, the Most High and the Most Near. And He is the All-Knower of everything. (57:3) The Eternal, Ever-Lasting, Ever-Living, Self-Sufficient One, the Lord and Sovereign of all things, the One to Whom you should always turn. Allah is the One in Whom you should put your trust and to Whom you should turn for refuge, He will be sufficient for you and will be your helper and supporter, and will cause you to prevail. As Allah says:

يٲيها الرسول بلغ ما أنزل إليك من ربك وإن لم تفعل فما بلغت رسالته والله يعصمك من الناس

O Messenger! Proclaim which has been sent down to you from your Lord. And if you do not, then you have not conveyed His Message. Allah will protect you from mankind. (5:67)

وسبح بحمده

and glorify His praises, means, combine praising Him with glorifying Him. Hence the Messenger of Allah used to say:

سبحانك اللهم ربنا وبحمدك

Glory be to You, O Allah, and with Your praise. So the Ayah means: be sincere in worshipping Him and putting your trust in Him. This is like the Ayat:

رب المشرق والمغرب ﻻ إله إﻻ هو فاتخذه وكيﻼ

The Lord of the east and the west; there is no God but He. So take Him as a Trustee. (73:9)

فاعبده وتوكل عليه

So worship Him and put your trust in Him. (11:123)

قل هو الرحمن ءامنا به وعليه توكلنا

Say: "He is the Most Gracious, in Him we believe, and in Him we put our trust.'' (67:29)

وكفى به بذنوب عباده خبيرا

and sufficient is He as the All-Knower of the sins of His servants. means, by His perfect knowledge nothing is hidden from Him nor can anything be hidden from Him, not even a speck of dust's weight